2001251253 has 4 divisors (see below), whose sum is σ = 2668335008. Its totient is φ = 1334167500.

The previous prime is 2001251179. The next prime is 2001251257. The reversal of 2001251253 is 3521521002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2001251253 - 2¹³ = 2001243061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001251257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333541873 + ... + 333541878.

It is an arithmetic number, because the mean of its divisors is an integer number (667083752).

Almost surely, 2^2001251253 is an apocalyptic number.

It is an amenable number.

2001251253 is a deficient number, since it is larger than the sum of its proper divisors (667083755).

2001251253 is an equidigital number, since it uses as much as digits as its factorization.

2001251253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667083754.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2001251253 is about 44735.3467964651. The cubic root of 2001251253 is about 1260.1837417857.

Adding to 2001251253 its reverse (3521521002), we get a palindrome (5522772255).

The spelling of 2001251253 in words is "two billion, one million, two hundred fifty-one thousand, two hundred fifty-three".